Furnace



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- J. L. SPURGEON ET AL FURNACE Origigal Filed June 25 1923 .mi l E Patented July 1, 1224.

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JOSEPH LEROY SPURGEON AND THOMAS JEFFERSON FARLEY, O'F BLOOMTEIELD, IOWA.

FURNACE.

Application filed June 25, 1923, Serial No. 647,497.

T all whom it may concern:

Be it known that we, J. L. SPURGEON and T. J. FARLEY, citizens of the United States, residing at Bloomfield,-in the county of Davis and State of Iowa, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

This invention relates to certain new and useful improvements in furnaces, and has particular reference to the provision of a combined hot water or steam and hot air furnace particularly adapted for the heating of rooms by hot air and for supplying hot water or steam for various uses.

As object of the invention is to so con struct the furnace as to utilize the heat of the fire to a maximum extent in supplying hot air for heating purposes.

Another object of the invention is toprovide a practical construction of furnace em bodying hot air furnace construction combined with simple and efficient means for utilizing the heat of the same fire for supplying hot water or steam.

Vith the above general objects in view, and others that will become apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arrangement of parts here inafter more fully described, shown in the accompanying drawings and claimed.

In the drawings, wherein like reference characters indicate corresponding parts throughout the several views,

Figure 1 is a substantially central longitudinal sectional view through one form of furnace constructed in accordance with the present invention,

Figure 1" is a transverse sectional view on line 1-1* of Figure 1 and drawn on a smaller scale,

Figure 2 is a transverse vertical sectional View of a modified form of the invention,

Figure 3 is a horizontal sectional view of the device shown in Figure 2, and

Figure 4: is an enlarged fragmentary sectional view showing the detailed construction of the water-heating means employed in the construction shown in the Figure 1.

Referring more in detail to the several "views, particularly to Figures 1 and 4, the invention embodies a furnace including a base or foundation 5 constructed of cement or fire brick in the usual manner. Longitudinal side walls 6 are provided upon the Renewed April 10, 1924.

base 5 and an end wall 7 is provided at the back of the furnace as at 7, which walls are also formed of fire brick or the like. The front; wall 8 of the furnace is preferably constructed of fire brick with a space therebetween which may be filled with some suit' able heat insulating material, as at 9. This front wall is provided with the usual lower cleanout opening 10 and fuel opening 11, the opening 11 being above the grate 12 suitably mounted in the forward end of the furnace. The furnace also embodies inner side walls 13. spaced from the outer walls 6 so as to provide longitudinal side air spaces between the walls 6 and 13, as shown in Figure 1 The space between the grate 12 and the rear wall 7 is divided into a plurality of chambers by means of bridge walls 14 which extend transversely from one wall 13 to the opposite wall 13, the intermediate bridge wall being extended from the top wall 14: of the furnace down to a point spaced from the base 5, and the other bridge walls being extended from the base 5 upwardly to a pointspaced from the top wall 14. It will thus be seen that the products of combustion rising from the grate 12 will pass upwardly and over the first bridge wall and then downwardly under the next bridge wall, and so on. The rear wall 7 is provided with a bottom outlet as at 15 adapted for connection with the chimney or stack 16 into which the products of combustion pass after their passage around the bridge walls in the circuitous path shown.

A plurality of transverse tubes 17 are disposed in each compartment of the fur-.

nace and extend from one wall 13 to the opposite wall 13, so that the ends of these tubes communicate with the air spaces at the sides of the furnace. These tubes are arranged in vertical rows so that alternate rows incline in opposite directions as shown in Figure l and this insures circulation of air from one side of the furnace to the other through the,tubes in the direction of their inclination so that the air will be effectively heated and delivered through the outlets which are to be provided therefor.

It will also be seen that the arrangement of the bridge walls provides for efficient heating of the tubes in all of the compartments before the products of combustion pass through the chimney.

In order to provide for heating of water for the production of steam or hot water, an

inlet header 18 is disposedtransversely of the firepot above the grate 12 and near the foremost bridge wall 14. One end of the header 18 is adapted to be connected to a suitable source of supply in the well-known manner, and this header is provided at numerous points along is length with forwardly projecting branch pipes 19 which terminate in downturned outer ends as at 20 (see Figure at). Directly above the inlet header 18 is an outlet header 21, also disposed transversely of the firepot, and adapt ed to have one or more of its ends connected to pipes leading to the source of consumption of the steam or hot water, The header 21 is also provided with a plurality of forwardly projecting pipes 22 which terminate in downturned ends 23 positioned in staggered relation, so that alternate ones are positioned in a vertical plane forwardly of the remain ially of the outlet ends of the pipes 20. The

water entering the inlet header 18 is distributed through the various pipes 19 and through their downturned ends 20owhere the same is deflected radially in all directions against the inner surface of the pipe sections 25. The water then flows upwardly through the pipes 22 into the outlet header 21, in heated condition.

Referring to the form of the invention shown in Figures 2 and 3, it will be seen that the tubes 17 are provided in inclined position directly above the grate 12 and extending through the inner side walls 13 which are spaced from the outer walls 6 In this form of the invention there is only one compartment directly above the grate, and the inner walls 13 terminate at a point below the top wall 1 1 so as to leave an air space entirely around the combustion chamber, as shown. Also, the Walls 13 are preferably constructed of fire brick with an intervening space filled with heat insulating material as at 9 so that maximum heat is applied to the tubes 17 before the products of combustion pass out of the tube or chimney 16 that projects through the top walls 14 and 28, which wall 28 connects the inner walls 13 as shown in Figure 2. At one side of the furnace the outer wall 6 is provided with a cold air inlet 29 at the lower part of the furnace, and a hot air outlet 30 near the top wall 14 The inner walls 13 are spaced from the rear wall 7 and side walls 6 as shown in Figure 8, and they are provided with an inlaid water acket 31 which may have suitable inlets and outlets for the supply of water and exit of steam or hot water.

From the foregoing description it is believed that the construction and operation, as well as the advantages of the invention, will be readily appreciated by those skilled in the art.

Minor changes may be made without departing from the spirit and scope of the invention as claimed.

Having thus described the invention what we claim as new, and desire to secure by Let ters Patent, is

A. furnace including outer side walls and inner side walls spaced apart to provide air spaces therebetween, a grate disposed between the inner side walls, and transverse air heating tubes carried by and connecting the inner side walls and communicating with said air spaces at their ends, said tubes being arranged in vertical rows inclined in opposite directions, and water heating means above the grate, said water heating means comprising superimposed inlet and outlet headers having forwardly extending pipes provided with down turned ends, the ends of the pipes of the inlet header being arranged within the lower ends of the downturned ends of the pipes carried by the outlet header, and caps closing the lower ends of the pipes of the outlet header.

In testimony whereof we affix our signa ture.

JOSEPH LEROY SPURGEON. THOMAS JEFFERSON FARLEY. 

